/Engine/Plugins/Runtime/WebBrowserWidget/Source/WebBrowserWidget/Public/WebBrowser.h
Executes a JavaScript string in the context of the web page
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="Web Browser") void ExecuteJavascript ( const [FString](API\Runtime\Core\Containers\FString) & ScriptText )